AVNRT: Difference between revisions
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m (New page: {{Chapter|Supraventricular Rhythms}} {{Arrhythmias| | name = AV Nodal Re-entry Tachycardia (AVNRT) | locatieImage = | atrial_frequency = 180-250 bpm | ventricular_frequency = 180-250 bpm ...) |
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Two sensitive characteristics to identify AVNRT on the ECG are: | Two sensitive characteristics to identify AVNRT on the ECG are: | ||
* R'. This is a small secondary R wave. It resembles a [[#Bundle branch block|right | * R'. This is a small secondary R wave. It resembles a [[#Bundle branch block|right bundle branch block]], but the QRS width stays < 120ms. | ||
* RP << 100ms. The distance between the R and P waves is less than 100ms. | * RP << 100ms. The distance between the R and P waves is less than 100ms. | ||
{{clr}} | {{clr}} | ||
Revision as of 09:49, 13 November 2008
| This is part of: Supraventricular Rhythms |
| {{{locatieafbeelding}}} | |
| Atrial rate | 180-250 bpm |
| Ventricular rate | 180-250 bpm |
| Regularity | regular |
| Origin | AV node |
| P-wave | inside or right after the QRS complex |
| Effect of adenosine | terminates the arrhythmia(!) |
Example ECG: The first part of this example shows AVNRT. After injection of adenosine, the arrhythmia terminates. 
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Example ECG2: 
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An AV Nodal Re-entry Tachycardia (AVNRT) is a rapid tachycardia with a typical frequency around 200 bpm. The tachycardia origin is the AV node. A prerequisite for AVNRT is a slow and fast pathway in the AV node, most often caused by degradation of the AV nodular tissue. The dual pathways facilitate re-entry.
Two sensitive characteristics to identify AVNRT on the ECG are:
- R'. This is a small secondary R wave. It resembles a right bundle branch block, but the QRS width stays < 120ms.
- RP << 100ms. The distance between the R and P waves is less than 100ms.